Sound Design & Engineering
(or Sound Engineering & Design)
It's what we have, plus the engineering part. It conserves some vagueness in the sound design part, but helps narrowing and clearing the scope with the engineering part.
"Engineering" covers stuff like DAWs, measurement, recording, microphone (theory, techniques, types, placement), mixing (live and studio), mastering, and related hardware and software.
"Design" includes things like synthesis (synthesizers, samplers, effects, synthesis environments), foley artists, other non-synthesis-related sound dynamics design (sound synthesis normally refers to synthesizers and samplers), and related hardware and software.
"Sound Design" can be either too board or too narrow, depending on interpretation. "Engineering" helps to make the point clearer, but "Sound Design" still includes stuff that might not be on topic here.
SE admins want to implement more descriptive names and move away from things like "Stack Overflow" and "Server Fault". I think a more descriptive name can help this site grow through a more explicit scope. Examples of other SE sites' names include "Music: Practice & Theory", "Geographic Information Systems", and "Personal Finance & Money".
Feel free to add more cons, pros, and anything you think I'm missing in this post.